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    <p>
      <b>anabpf_int</b> - 
Analog band pass filter
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<IMG ALIGN="center" SRC="../../images/anabpf_int_gui.gif">
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    <h3>
      <font color="blue">Description</font>
    </h3>
The block first design a prototype low pass filter and then transform it to other filter types by analog filter transform law.
<h3>
      <font color="blue">Parameters</font>
    </h3>
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    <ul>
      <li>
        <tt>
          <b>order </b>
        </tt>
		the order of prototype filter.
		
		input a positive integer.
		</li>
      <li>
        <tt>
          <b>filter prototype</b>
        </tt>
		type of filter. 
		<tt>
          <b>0 </b>
        </tt>
			for buttworth
			<tt>
          <b> 1 </b>
        </tt>
				for chebyshev type 1
			<tt>
          <b> 2 </b>
        </tt>
				for chebyshev type 2
			<tt>
          <b> 3</b>
        </tt>
				for elliptical.
			</li>
      <li>
        <tt>
          <b>passband ripple </b>
        </tt>passband ripple, passband ripple  is used for cheb1 case, stopband ripple  is used for cheb2 case,  passband ripple  and  stopband ripple  are both used for ellip case. 0 &lt; passband ripple,stopband ripple &lt; 1  for cheb1 filters  1-passband ripple &lt; ripple &lt; 1  in passband,  for cheb2 filters  0 &lt; ripple &lt; stopband ripple  in stopband for ellip filters  1-passband ripple &lt; ripple &lt; 1  in passband,  0 &lt; ripple &lt; stopband ripple  in stopbandthis value is between 0 and 1.</li>
      <li>
        <tt>
          <b>stopband ripple </b>
        </tt>stopband ripple. see passband ripple.this value is between 0 and 1.</li>
      <li>
        <tt>
          <b>lower cutoff frequency(in radius) </b>
        </tt>lower cutoff frequency in radius.input positive number</li>
      <li>
        <tt>
          <b>upper cutoff frequency(in radius) </b>
        </tt>upper cutoff frequency in radius. This value must be bigger than lower cutoff frequency.input positive number</li>
      <li>
        <tt>
          <b>whether plot bode </b>
        </tt>whether plot bode diagram to show the frequency response of the filter.input 0 for no, positive number for yes</li>
    </ul>
    <h3>
      <font color="blue">Authors</font>
    </h3>
    <dl>
      <dd>
        <b>BUPT</b>
Zhao Yuan
</dd>
    </dl>
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